Answer:
First, the impact load is defined as a load case in RFEM or RSTAB. This load case is then considered in a load or result combination, for which the support forces are determined.
In the design, RF-/FOUNDATION Pro always uses the support forces from RFEM or RSTAB. This applies to all design checks and cannot be controlled separately.
It is only possible to completely deactivate a certain support force for the design checks.
If you do not want to consider a load for geotechnical design, for example, because the foundation is otherwise constructively stabilized with regard to the impact load, it is possible to deactivate the load in the setting shown in the image.
However, if it is necessary to consider the impact load for bending design (for example, design of bucket walls), you should copy the design case and include the impact load again.
The foundation evaluation would then be performed using two design cases in the module.